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G. R. BIBNEY.

SURFACE HEATER.

Armcmon FILED In. 15. m2.

1,135,493. Patented Apr. 13,1915.

DIE ms mom PHOTO-m4 'm'mm. D. C

UNITED STATES PATENT OFFICE.

GEORGE B. BIBJTEY, F PHILADELPHIA, PENNSYLVANIA, ASSIGNOB TO THE BARBER ASPHALT PAVING COMPANY, 01? PHILADELPHIA, PENNSYLVANIA, A. CORPORA- 2101] OF WET VIRGINIA.

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Specification of Letters Patent.

Patented Apr. 13, 1915.

To an 'whoma't may concern:

Be it known that I, Gnome B. Bnmmr, of the city and county of Philadelphia, State of Pennsylvania, have invented certain new 5 and useful Improvements in Surface-Heaters, of which the following is a specification, reference being bad to the accompanying drawings.

My invention relates to a surface heating 0 machine of the general character shown in United States Letters Patent No. 931,085, granted August 17th, 1909 to Prescott and Kerns. Said machine consists esentially in the combination of a steam roller, a transverse down flue terminating m a hood by means of which the heated prodnets of combustion produced in the fire box ese? by "tiiifia dsfifi 1s ro may, as zoan causedtoimpingeuponthesurfaceto lfieliriated. suclrfisurfall celieatersarensed or e urpose eating itmminous vsurfiicesandallotherkindsof for various purposes- In a heater of this character it IS customary to employ a blast orofliersimilarmeansforthepurposeof inducing the required draft to deflect the heated products of combustion downwardly tothesurfacetobeheateiandinthelresso cottandKernspatentrefenedtqthissteam blastisobtainedbymeansofapipearryingsteamfmmthestcamboileroftheengine, anditwithintheflne. In aheaterofthischaracteritisverydesir- 5 able to heat the surface to the highest sible temperature in the shortest 1e time. The steam blast by blowing up the firetendstofacilitatethis,buttoaoertain b hmfmtgeth ih iifil 40 para v ow tempera 0 which at! with the heated products of combustion tends to somewhat reduce their tqnperature and by the fact that the steam pipe being exposed to the atmosphere, 6 the steam will condense thereby reducing the presure of the blast and wetting the surface that is to be heated. My invention relates to means for obviating this difliculty, and markedly increasing the heat which is ill procurable in a short time beneath the hood of the machine: I accomplish this by cansing the pipe which conducts the steam for the blast from the boiler to pas flue for a considerable portion of its length,

whereby the steam is not only prevented within the p from 000 I but also superheated and dehvered at; e blast at a much er temperature and approximately to that of the gas, thereby preventing condensation. My mventlon also relates to a modified construction of the fire box of the steam boiler, whereby the heated products of combustion m a be more directly and at a' or temperature into the flue by which thefiare camedtothe surface tobeheated. the accompanying drawings, I have llustrated a surface heater embodying my mvephonl, sho th machm' e1 Figure ws 0 e y in evation and partly in longitmfid l section. Figjllsanenlargedsectlonalviewofthe fire box and ad acent parts of the boiler.

Thepartsofthemachinewhicharecommonto steamrollers ofthis neednot beespeclallyreferredtqas eyarewell known.

Thesteamboiler1,hasitsfireboxprolonged in the fonln of an extfseilzihsion 2, with corresponding pro ongation o e to bars 3 Thesides ofthisextensiomas zl lasthe sides of the remainder of the fire box are W sen s? gs? th y, 51011 are o to 5, that portion of the boiler (o comparati y shght height) which overlies the extension 85 of the fire box. This latter portion of the boiler is surmounted by the curved conducting piece 7, by which the products of combustlo p throughtheshortfiretubes 5, are ed to e horizontal flue 10. This flue is of considerable length and rojects beyond the end of the steam roller, e projectirf end being supportedby the braces 11, 11. t its farthest extremity the horizontal flue 10, communicates with the verfiml fine 12, on the lower end of which is secured a hood 13, with capacitgmfor vertiml adjustment with relation to flue, so that it may beloweredtothesurfaoetobeheated, or raised sufiiciently thereabove. For the purpose of controlling the motion of the hood, a steam cylinder 15, surmounts the vertical flue 12, and by means of connections not shown, efiects the 0 tion ofthe hood. A. steam pipe 20, lea from the steam boiler and enters the horizontal flue in proximity tothe endofthedgfneargtttflhcbogilreur.l The 1pc passes thro near 0 en ength of this horizontal flue andthen after v w inghasinsertedwithinitavalve30,w c. 110

may be 0 ted by means of the rod 31, and hen e hmtelans of this valve steam assm'gt esteam'pipemay besen to the cylin er 15, which 0 tes the hood, or to the steam blower 35, which is of known construction, and is mounted centrally the vertical portion of the fine and is useful to accelerate the down draft by which the heated products of combustion are led from the fire box to the surface to be heated whereby the draft is so increased as to blow up the fine and secure the required temperature.

It will be noted that the heated products of combustion are, by the arrangement which I have shown, led directly from the fire box, through the short fire tubes 5, and conductingpiece 7, into-the flue, whereas in previous constructions of this character, th have been taken from the side of the b0 er. It will also be noted that the steam by which the blast is produced is highly superheated because of the length of the steam pipe traver'sing the flue, wherein the-steam is subject to peratnre, so that when dishlghtem atthe blast,itdoesnot substantiallv difier in temperature from theproducts of combustion traversing the flue, thus markedly the temperature at which these products 0 combustion are caused to impinge upon the surface to be heated.

By means of an apparatus of this character, I an enabled to obtain a temperature of one thousand degrees or more underneath the hood very rapidly, and can thus suflici'gaitly heat surface of an asphalt pave ment,sothatmtwoorthreeminutesthe entiresurface mayberemored and new surface material put in'its place.

flaring thus described my invention, I

LIha'machinefm-heafingsurfacathe combination of a vehicle; means mounted thereon for producing heated productsof combustion; a long horizontal flue, with a depending end fitted with a hood, whereby these heated roducts of combustion are led to and caused to impinge upon the surface to beheated; a steam blast apparatus discharging within said flue, near the hood, and inducing the required down draft within the fluei; g1 steam pipe leading from a boiler to sai est, sai steam i being arranged to pass'for a consider bltdistance within the flue, whereby the high temperature of the steam is maintained and condensation thereof prevented.

2. In a machine for heating surfaces, the combination ofa vehicle; means mounted thereon for producing heated mducts of combustion; a long horizontal 1:, with a depending end fitted with a hood, whereby these heated roducts of combustion are led to and ca to imp e upon the surface tobeheated;asteam lastaplparatusdischarging within said flue, near e hood, and inducing the down draft within the fine; a steam lpe leading a boiler to said blast, sai steam pi bemg to pass for a considerabl e v distance wi the flue, whereby the high temperature of the stiam is and condensation thereo preven sa1 steam pipe cm causedtoeme fromthefluefora distance f fore thetlsteam a paratus orpurposaso regula on. In t stimony whereof, gelhlair: signed m name a Phfla p msy Vania, eleventh day of March, 1912.

GEORGE n. BIRNEY.

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